There's a fitting towards the back of the intake manifold, right next to the distributor. A hose was fitted to this and hooks into a t with one of the heater hoses.

Well, the hose with fitting broke off while I was putting in a new coil and distributor cap. Whatever the fitting was, it was corroded very badly. Looks like it was a pipe fitting of some kind, but it's totally destroyed now.

Anyone have the measurements of one of these?

 

should be 3/8 NPT or 1/2 NPT. look at a fitting in a hardwear store and there's a big differance in size so it should be easy for you to tell which it is

 

Yeah those always do that.

It used to be ½" pipe. It'll take some drilling and tapping to restore it to usefulness though.

Although, I've seen someone have success by tapping its remains out to (I think) 3/8" pipe, and screwing a new adapter of that size into it....

 

Thanks, I'll be working on it tomorrow night...